How could any UK government be responsible for GLOBAL warming (as you said)?
I wasn't singling out the UK government, but making the point that government is responsible for policy that directly affects industry, power supply and the subsequent environmental impact of those decisions. Environment scientists have been warning about this for decades now - when I was studying it a university in the early 90s we already knew that we had to massively reduce our reliance on fossil fuels.
What our government, or parliament if you wish, has failed is flood mitigation - another topic I studied almost 30 years ago. The UK's drainage systems have been built up over hundreds of years and every thing was working well and in good balance, but recent governments (I am not interested in playing the blame game so don't ask me which) have stopped investing in drainage maintenance, have endorsed change of land with more woodland lost, have approved building on flood plains etc. To suggest that it is not their fault is rather short-sighted.
Even if global warming is natural (which is isn't) then we still need to prepare for it, and our governments have completely failed to do anything. Much of the UK was uninhabitable for much of the year in the past - e.g. Somerset's name derives from the fact that it attracted summer settlers - it would be flooded for half the year. Many settlements have grown because of the work done in the past to build flood defences, river barriers, and drainage systems. But all this is being left to rot now.
It's a bit like all these damp problems people have on this forum. A house that was once high and dry, gets altered, with raised paths and patios, has drainage channels blocked due to lack of maintenance, has natural soakaways replaced with impermeable driveways and patios, and then they wonder why 50 years after it was built it becomes damp, mouldy and uninhabitable.
In short - people are to blame. People need to fix it.